Grab-bucket.



E. E. BROSIUS.

GRAB BucKE.

Patented Feb. 6, 1917.

3 SHEETS-SHEET 1 E. E. BHOSIUS.

GRAB BUCKET.

APPLICATION FILED APR. 5. 1915.

1,214,997. Patented. Feb. 6,1917.

3 SHEETS-SHEET 2.

wn'NEssEs, INVENTOR mr mmm: sirens co.. Mom-uma. wAsmNcm/v. n c.

E. E. BROSIUS.

GRAB BUCKET.

APPLICATION FILED APR. 5. IsIe.

Patented Feb. 6, 1917.

WITNESSES I l I I I I I I I I I I l.

EDGAR E. BROSIUS, OF-PITTSBURGI-I, PENNSYLVANIA.

GRAB-BUCKET.

Specification of Letters Patent.

Patented Feb. ti, 1917.,

Application led April 5, 1916. Serial No. 89,052.

To all whom t may concerti.'

Be it known that I, EDGAR E. BRosrUs, a citizen of the United States,residing at Pittsburgh, Allegheny county, Pennsylvania, have invented anew and useful Improvement in Grab-Buckets, of which the following is afull, clear, and exact description, reference being had to theaccompanying drawings, forming part of this specification, in whichFigure 1 is an end view of a grab bucket embodying my invention, withthe bucket sections closed.

Fig. 2 is a similar view showing the. bucket in its wide open position.

Fig. 3 is a side View of the 'bucket closed.

Figs. 1 and 5 are detail views showing in side and end elevation,respectively, one of the link members, and

Fifi'. 6 is a detail view ing members.

My invention has relation to grab buckets, and more particularly to grab'buckets of the type described and claimed in my Patent No. 1,168,279 ofJanuary 18, 1916.

The present invention is designed as an improvement upon the bucket ofmy said patent. In that patent I have described and claimed a grabbucket of a. type adapted to have a very wide opening. In such bucketsit is highly important that effective means shall be provided forpreventing end movement of the bucket sections relatively to each other.In my said patent I provided the connecting links between the lever armsof the bucket sections with guide portions which were engaged bycoperating guiding sheaves or wheels. My present invention obviates thenecessity of such guiding means, by so constructing the two connectinglinks and arranging them with respect to each other, that the linksthemselves exert the necessary guiding action, and effectively preventend movement of one 'bucket section and its connected parts with respectto the other. This very considerably simplifies the construction of thebucket. The present arrangement also increases the strength of the partsand better ada-pts them to withstand the severe strains which areincident to wide opening buckets of this type.

As will appear by reference to the accompanying drawings and to my saidpatent, the general construction of the bucket is the same as shown anddescribed in said patshowing the openent. In the present drawings` thenumerals 2 and 3 designate the two bucket sections or scoops, eachhaving at each end an upwardly extending long lever arm il. 7 and 8designate the diagonal link members, each of which connects the upperend portions of one pair of the arms l with the lower portions of theother part oit said. arms. 9 and 10 designate the two ropening memberspivoted together at their lower portions at 11, and each having a ropesheave 12 pivoted thereto. rllhe Lipper arm of the lever 9 is pivotallyconnected at 13 with a projection l-L on the link 8; and the upper armot the leverlO is similarly connected at 15 with a projection 16 on thelink 7.

In accordance with my present invention the link 8 is of double web orslotted form (see Fig. at), thereby providing an opening therethroughthrough which the link 7 eX- tends, the two links being tree to moveupon each other, and to exert a mutual guiding action, while at the sametime restraining any movement in the direction of the longitudinal axisof the bucket. The manner in which the link 7 extends through the link 8is indicated in dotted lines in Fig. et. The link 7 is also of thedouble web or slotted form shown to provide an opening therethrough forthe tree movement of the projection 14 of the link 8.

The particular bucket illustrated is arranged to be operated by the twoclosing lines or cables 17 and the two opening lines 18. The openinglines 18 are connected rcspectively at their lower ends to the lowerportions of the opening levers 9 and 10. The closing lines extend underthe respective sheaves 12 and thence down and around the sheaves 19journaled between the lower portions of the arms 4. The sheaves 19 aredouble sheaves, the rope or cable 17 passing downwardly under one of thesheaves 12; thence around one member of one sheave 19, thence up andacross and around one member of the other sheave 19 between the oppositearms, and thence down and under and around the other member of the iirstsheave, and thence down and across to the other member of the oppositesheave, and thence under the sheave 12 and then upwardly. This gives avery powerful closing leverage upon the-arms 4 and the bucket sections.I do not, however, limit myself in my broader claims to any particulararrangement of the operating ropes or cables, since these may bearranged in various ways, using two, three or four lines.

The general operation of the bucket is the same as described in my saidpatent. It will also be noted that while I have changed the form of thediagonal connecting links, I am still enabled to use links in the formof rigid integral castings having long sleeve or barrel bearings attheir ends. This not only provides a very strong and serviceableconstruction, but it also minimizes the machine work necessary in theconstruction of the bucket.

I claim:

l. A grab bucket comprising two bucket sections having upwardlyextending long lever arms, and a link member connecting the upperportion oit the arms o1 one bucket section with the lower portions oitthe arms of the other bucket section, said link members having guidingportions coacting with each other throughout the opening and closingmovements of said sections to thereby act to mutually restrain thesections against relative endwise movement, substantially as described.

2. A grab bucket comprising two bucket sections having upwardlyextending long lever arms, and a link member connecting the upperportion of the arms of one bucket section with the lower portions of thearms oiz the other bucket section, one of said link members passingthrough a slotted opening in the other link member and said link membersexerting a guiding and restraining action each upon the other to preventrelative endwise movement of the bucket sections, substantially asdescribed.

3. A grab bucket comprising two bucket sections having upwardlyextending long lever arms, and a link member connecting the upperportion oit' the arms of one bucket section with the lower portions ofthe arms of the other bucket section, said link members having mutuallyengaging guiding snrfaces and each link member acting upon the other torestrain relative endwise movement ofthe bucket sections, substantiallyas described.

t. A grab bucket comprising two bucket sections each of which hasupwardly extending lever arms, a link member connecting the upperportion of each pair of arms with the lower portion of the arms olf theother lnicket section, each of said link members having a projection andan opening lever attached to said projection, one of said link membersbeing slotted to receive therethrough the other link member and itsprojectionand the last named link member being also slotted to receivetherethrough the projection of the lirst named link member,substantially as described.

5. A grab bucket comprising two bucket sections each having a pair ofupwardly eX- tending long lever arms, diagonal intersecting links, eachoit said links connecting the upper portion of one pair of lever armswith the lower portion oit' the other pair of lever arms, a pair ofopening levers pivotally connected to each other and each carrying asheave, a double sheave mounted on each pair of lever arms, an openingline connected to each 0I" the opening members, and a closing Vline orcable passing under the sheaves on the opening members and having adouble passl around said double sheaves, substantially as described.

In testimony whereof, I have hereunto set my hand.

EDGAR E. BROSIUS.

`Witnessesz GEO. B, BLEMING, GEO. H. PARMELEE.

Copies of this patent may be obtained for ve cents each, by addressing'the Commissioner of Patents, Washington, D. C.

